Barcelona

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Let's start with the obvious.

No team in the world would want to come up against Barcelona at the moment, and Arsenal are no different than the rest.

What is more, the Blaugrana have become a bogey team for the Gunners in recent history, as they have knocked them out in their last three head-to-head knockout-stage matches. Arsenal fans will also remember the 2006 Champions League final in which Barcelona overturned a one-goal disadvantage to win the competition.

With their dreadful record against Barcelona and their poor performances in the group stage, Arsenal will definitely want to avoid the Blaugrana in the Champions League.